Thread: Engine Ground to Chassis wire

Ok so I want to do the rest of my Big 3, I've done the alternator rewire and upgraded the negative battery terminal ground but I can't find this wire anywhere. Anyone know where it is. Pics of it would be awesome if possible. TIA.

You could run a wire from the alternator bracket nut (15MM) to one of the strut tower nuts.

I've seen the chassis to engine one, but can't remember where it was. May have been on the ledge under the airbox over to the tranny? not sure though.

There are two main grounds from the battery if I recall correctly. One comes off the terminal and goes to a connection directly below the battery on the frame. The other goes over to the transmission bell housing and is a larger wire.

I replaced the one to the frame with 4awg wire and the one to the bell housing with originally 1/0Awg wire but I think when I put everything back together I'll just use high strand count 2Awg wire. I also had a 1/0Awg wire from the positive to the starter and of course the 4awg wire from the alternator to the fuse box and then another 4awg (I think) from the positive of the battery to the fuse box terminal.

And I have now completely pulled out the old alternator cable. THAT is one long wire for a simple 2.5' run from the alternator to the fuse box.

When I got that wire out, I checked the resistance on it and ran the calculations (assuming max alternator output of 105amps) and at that load there is nearly a full volt loss across that wire and thats for one that is in relatively good shape. I can only imagine what it would be with a terminal that is corroded or a wire that is in less than ideal condition.

The 4awg replacement wire, well at full load, its just barely a 0.05v drop based on the calculations.